Troubleshooting - Stanley HD08 User Manual

If symptoms of poor performance develop, the following
chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the hammer drill,
always check that the hydraulic power source is supply-
ing the correct hydraulic fl ow and a pressure to the tool as
PROBLEM
Drill will not start
Low hammer impact or drilling torque.

TROUBLESHOOTING

CAUSE
Power not being supplied.
Defective quick-disconnect.
Jammed motor and/or parts.
Flow reversed through hoses.
Incorrect hydraulic fl ow.
Defective quick-disconnect.
Worn impact mechanism.
Incorrect grease.
Reversing spool incorrectly installed.
Hydraulic circuit relilef set too low, hoses
too restrictive or the hydraulic fl uid is too
thick.
Fluid restriction in hose or valve. Excess
back pressure.
Priority fl ow control valve or reverse check
valve is malfunctioning.
listed in the table. Use a fl owmeter known to be accurate.
Check the fl ow with the hydraulic fl uid temperature at least
o o
80 F / 27 C.
Check to make certain that both hoses are
connectd.
Turn hydraulic circuit control valve ON.
Check each disconnect separately. Re-
place as neccessary.
Separate modules and inspect. See
Service Instructions. Do not force parts
together.
Correct the power source control valve
position. Prevent reverse fl ow by using
only one port from the valve for pressure,
the return tool hose to the cooler and the
fi lter line. Correct the quick-disconnect
male/female routing per instructions and
arrows on the fi ttings.
Check that the hydraulic power source is
producing 4-9 gpm / 15-34 lpm at 750-
2000 psi / 53-140 bar.
Check each disconnect separately.
Separate modules and repair or replace
impact mechanism. See Service Instruc-
tions.
Metabo (forward module) mechanism is
full of fl uid or contaminants or is improp-
erly greased. "Clean out, re-lubricate,
and/or repair per Matabo instructions. See
instructions for separating the rear module
to supply Metabo portion to the dealer for
service".
Reversing spool upside down. Do not
separate modules. See Service Instruc-
tions.
Set relief valve at 2100 psi / 145 bar. See
Service Instructions.
Locate and remove restriction.
Use correct fl uid.
Fluid not warmed-up. Preheat system.
Hoses too long for hose ID. Use shorter
hose.
Do not separate modules. See Service
Instructions.
15
SOLUTION